Yair . . . I suppose you can go to as much trouble as you like but, fairdinkum, it aint rocket science.
For a contractor it used to be a wet day job, do a few at a time (and put a few runs on the idlers if they stop in the right position) they are freaking grouser bars for goodness sake, a consumable, all they have to do is stay there and wear out.
I was never aware there was material made to accommodate curved ends we just put in a few extra runs to fill the gaps . . . I did catch a bloke using a grinder to clean up his welds once though.
I will say that that this was for our own machines if you are doing them for a client you may want to ask can does he want a job that gives the tractor back its normal traction in order to make a dollar or job that gives the tractor back its traction and also looks real pretty . . . and give the two different prices.
Cheers.